Package oracle.spatial.util

Class GroupingLOD1Generalization

  • public class GroupingLOD1Generalization
extends java.lang.Object

    • Constructor Summary

      Constructors 
      Constructor Description
      GroupingLOD1Generalization()
      Java class that groups LOD1 geometries to generalize.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.util.ArrayList typification​(java.lang.String tableName, java.lang.String columnName, java.sql.Connection conn, double tolerance)
      Groups the LOD1 geometries.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • GroupingLOD1Generalization

        public GroupingLOD1Generalization()
        Java class that groups LOD1 geometries to generalize. The LOD levels are as follows: LOD 4 - Full texture - Given by Navteq LOD 3 - Same geometry, no texture LOD 2 - "SIMPLIFIED GEOMETRY" LOD 1 - Extrude geometry : Use footprint and average height LOD 0 - Group LOD 1 Geometry : How?- This class resolves this issue. Footprints on ground must be merged like hull operation then extrude This last operation is called typification. We assume during grouping that: - buildings' grounds are at z=0 plane and height is +ive.
        Since:
        JDBC Driver

    • Method Detail

      • typification

        public java.util.ArrayList typification​(java.lang.String tableName,
                                        java.lang.String columnName,
                                        java.sql.Connection conn,
                                        double tolerance)
                                 throws java.lang.Exception
        Groups the LOD1 geometries. The LOD levels are as follows: LOD 4 - Full texture - Given by Navteq LOD 3 - Same geometry, no texture LOD 2 - "SIMPLIFIED GEOMETRY" LOD 1 - Extrude geometry : Use footprint and average height LOD 0 - Group LOD 1 Geometry : How?- This class resolves this issue. Footprints on ground must be merged like hull operation then extrude This last operation is called typification. Execution plan: a) Ground plan computation using 3D MBR formation method in JGeometry class and then ignores the z-coordinates. Very cheap computation!i Dont use g3dconv since some geoms (buildings) may not touch the ground. b) Use sdo_sam.bin_layer function to get groups of buildings and then c) Use the convex_hull (concave hull later by Ying Hu) to combine a group into a single geometry. d) Use extrusion to get 3D geometries.
        Parameters:
        tableName - Table name where a bunch of groups of (3D Building) J3D_Geometry geometries to be generalized exist.
        columnName - Column name of the table name where the geometries to be generalizaed exist.
        conn - Database connection
        tolerance - Tolerance
        Returns:
        an ArrayList of JGeometry (3D) geometries
        Throws:
        java.lang.Exception - if an error occurs.
        Since:
        11gR2